PURPOSE: To obtain a steady picture data, by compensating the variance of the light volume of a light flash source with a simple circuit using a storage type pickup tube and a nonstorage type photoelectric conversion element.

CONSTITUTION: A pickup means DET of storage type picks up a transmitted image or a reflected image of a subject irradiated by a flash light source SL. A nonstorage type photodetector PD receives the incidence of a part of the light from the source SL and delivers an electric signal in accordance with the intensity of the emitted light. The output of the PD is integrated INT, and the output video signal of the DET is divided by the output of the integrating means INT. The output of the dividing means DIV is used for the output of a video signal.